LIST OF ILLUSTRATIONS. 
Plates I. to III. — Lord Oxmantown on the Great Nebula in Orion. 
Plates IV. to VII. — Drs. A. Carte and A. Macalister on the Anatomy of Balamoptera 
rostrata. 
Plates VIII. to XIV. — Mr. J. L. Clarke on the Intimate Structure of the Brain. 
Plates XV. to XVII. — Professor Phillips on some Parts of the Surface of the Moon. 
Plates XVIII. to XXI. — Dr. Everett on Atmospheric Electricity. 
Plates XXII. to XXIV. — Lieut.-General Sabine on Terrestrial Magnetism. 
Plates XXV. to XXX. — The Astronomer Royal on the Comparison of Magnetic 
Disturbances with Terrestrial Galvanic Currents. 
Plates XXXI. & XXXII. — Staff Captain Evans, R.N., on the Changes of Polar Mag- 
netism in the Iron and Armour-Plated Ship ‘ Northumberland.’ 
Plate XXXIII. — Mr. W. Huggins on the Spectra of some of the Stars and Nebula'. 
Plate XXXIV. — M. A. L. O. Des Cloizeaux on the Dispersion of the Optic Axes in 
Harmotome and Wohlerite. 
Plate XXXV. — Professor T. Wharton Jones on the Caudal Heart of the Eel. 
Plates XXXVI. & XXXVII. — Mr. William Parkes on the Tides of Bombay and 
Kurrachee. 
N.B. Plate III. is issued in a separate pocket. 
